<template>
  <div class="app-container">
    <el-form label-width="120px">

      <el-form-item label="讲师名称">
        <el-input v-model="teacher.name"/>
      </el-form-item>
      <el-form-item label="讲师排序">
        <el-input-number v-model="teacher.sort" :min="0" controls-position="right"/>
      </el-form-item>
      <el-form-item label="讲师头衔">
        <el-select v-model="teacher.level" clearable placeholder="请选择">
          <!--
            数据类型一定要和取出的json中的一致，否则没法回填
            因此，这里value使用动态绑定的值，保证其数据类型是number
          -->
          <el-option :value="1" label="高级讲师"/>
          <el-option :value="2" label="首席讲师"/>
        </el-select>
      </el-form-item>
      <el-form-item label="讲师资历">
        <el-input v-model="teacher.career"/>
      </el-form-item>
      <el-form-item label="讲师简介">
        <el-input v-model="teacher.intro" :rows="10" type="textarea"/>
      </el-form-item>

      <!-- 讲师头像 -->
      <el-form-item label="讲师头像">

        <!-- 头衔缩略图 -->
        <pan-thumb :image="teacher.avatar"/>
        <!-- 文件上传按钮 -->
        <el-button type="primary" icon="el-icon-upload" @click="imagecropperShow=true">更换头像
        </el-button>

        <!--
            v-show：是否显示上传组件
            :key：类似于id，如果一个页面多个图片上传控件，可以做区分
            :url：后台上传的url地址
            @close：关闭上传组件
            @crop-upload-success：上传成功后的回调
              <input type="file" name="file"/>
            -->
        <image-cropper v-show="imagecropperShow" :width="300" :height="300" :key="imagecropperKey"
                       :url="BASE_API+'eduoss/fileoss'"
                       field="file" @close="close" @crop-upload-success="cropSuccess"/>
      </el-form-item>

      <el-form-item>
        <el-button :disabled="saveBtnDisabled" type="primary" @click="saveOrUpdate">保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script>
// eslint-disable-next-line no-unused-vars
import teacher from '@/api/edu/teacher'
import ImageCropper from '@/components/ImageCropper'
import PanThumb from '@/components/PanThumb'

export default {
  components: {
    ImageCropper,
    PanThumb
  },
  data() {
    return {
      teacher: {
        name: '',
        sort: 0,
        level: 1,
        career: '',
        intro: '',
        avatar: ''
      },
      saveBtnDisabled: false, // 保存按钮是否禁用,
      isSave: true, // 是否是保存操作
      imagecropperShow: false,
      imagecropperKey: 0, //上传组件key值
      BASE_API: process.env.BASE_API //获取dev.env.js里面地址
    }
  },
  watch: {
    $route(to, from) {
      console.log('watch $route')
      this.init()
    }
  },
  created() {
    this.init()
  },
  methods: {
    close() { //关闭上传弹框的方法
      this.imagecropperShow = false
      //上传组件初始化
      this.imagecropperKey = this.imagecropperKey + 1
    },
    //上传成功方法
    cropSuccess(data) {
      this.imagecropperShow = false
      //上传之后接口返回图片地址
      this.teacher.avatar = data.url
      this.imagecropperKey = this.imagecropperKey + 1
    },

    init() {
      if (this.$route.params && this.$route.params.id) {
        const id = this.$route.params.id
        this.getInfo(id)
        this.isSave = false
      } else {
        // 使用对象拓展运算符，拷贝对象，而不是引用，
        // 否则新增一条记录后，defaultForm就变成了之前新增的teacher的值
        this.isSave = true
        this.teacher = {
          ...teacher
        }
      }
    },

    // 根据id查询讲师信息
    getInfo(id) {
      teacher.getTeacherIno(id)
        .then(response => {
          this.teacher = response.data.teacher
        })
        .catch((response) => {
          this.$message({
            type: 'error',
            message: '获取数据失败'
          })
        })
    },
    saveOrUpdate() {
      this.saveBtnDisabled = true
      if (this.isSave) {
        this.saveData()
      } else {
        this.editTeacher()
      }
    },
    // 修改
    editTeacher() {
      teacher.updateTeacher(this.teacher)
        .then(response => {
          // 提示信息
          this.$message({
            type: 'success',
            message: '修改成功'
          })
          // 路由跳转
          this.$router.push({
            path: '/teacher/list'
          })
        })
        // eslint-disable-next-line handle-callback-err
        .catch(error => {
          this.$message({
            type: 'success',
            message: '修改失败'
          })
        })
    },
    // 保存
    saveData() {
      teacher.save(this.teacher)
        .then(response => {
          // 提示信息
          this.$message({
            type: 'success',
            message: '添加成功'
          })
          // 路由跳转
          this.$router.push({
            path: '/teacher/list'
          })
        })
        // eslint-disable-next-line handle-callback-err
        .catch(error => {
          this.$message({
            type: 'success',
            message: '添加失败'
          })
        })
    }

  }
}
</script>
